johnson



(No Model.) 3 Sheets-Sheet 1.

A. F. & F. B. JOHNSON.

SECRET PRINTING TELEGRAPH.

Patented Jan. 31,1882.

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(No Model) A. P. 827 F. B, JOHNSON.

SECRET PRINTING TELEGRAPH.

Patented Jan. 31, 1882.

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(No Model.) 3 Sheets-Sheet 3.

A. F. 8: P. B. JOHNSON.

SEGRET PRINTING TELEGRAPH.

No. 253,063. Patented Jan. 31,1882.

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UNITED STATES PATENT OFFIcn,

ALBERT F. JOHNSON ANDFBANK B. JOHNSON, OF BROOKLYN, N. Y., ASSIGN- ORS TO THE JOHNSON MANUFACTURING COMPANY, OF SAME PLACE.

SEC ET-PRINTING TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 253,063, dated January 31, 1882. Application filed November 8, 1881. (No model.)

mechanism ,for receiving and printing, tele-i graphic messages in such manner that the contents or purport of the same cannot be as eeriaiueu byany person inch arge of the receiving-instrument, or who may be watching its movements while the message is being printed; and the said improvements are designed'to be used in our improved system of transmitting secret messages by electric-telegraph instruments, (described in the specifi cation of said invention marked A, and filed 5 August 16, 1881,) and to be automatically operated by a suitable transmitting-instrumcnt through the medium of electric impulses, sentover ordinary telegraphic line-wires.

The invention consists in a telegraphic re 3 ceiving-instrument provided with devices, as

hereinafter particularly described, for auto- "matically sealing over and upon the message strip a second strip of paper to conceal the message from view before the same passes from 3 5 theinstruxnent; also, in improved mechanism for operating the transverse feed of the printing- Wheel, as hereinafter particularly dc. scribed; and it further consists in the novel construction and combination of parts, as here- 49 inafter set forth.

In the accompanying drawings, Figure 1 represents a plan view of the instrument; Fig. 2, a side elevation o'fthe same; Fig. 3, an elevation of the oppositeside; Fig. 4, a longitudinal vertical section; Fig. 5, a detached view oftbo mechanism for effecting the transverse and rotary movements of the printingwheel; Fig. 6, a plan view of the devices for concealing the message strip while the message is being printed thereon; and Figs. 7 and 8, de- 5o 7 tro-magnetson the instrument herein describedr Four of 'such magnetsare employed,

as follows, viz: 0 isamagnet, to the armature'of which is attached one endof a lever, 13, to the other end of which is pivoted a pawl, 14, which rotates a ratchet-wheel, 12, securedfupon the end of a feed-roller, q, having hearings in the frame R, and effects the longitudinal movement of the message-strip 0- isa magnet, to the armature of which is connected mechanism, hereinafter particu- 7o larly described, which effects the transverse movements of the printing-wheel. o is amagnet, to the armature of which is pivoted a pawl, which rotates a ratchet-wheel, t fixed upon theshaftt, which carries the printing;- wheel f, and thus efi'ects the rotary movement of the printing-wheel; and o is a magnet, to the armature of which is attached one end of a pivoted frame, 16, the other end of said frame carrying the platen or impressing-roller a, which latter is thereby raised to bring the message-strip G in contact with the printingh l at. a h stroke of the said armature.

The messagestrip G is placed upon a reel, R at the top of the frame, and thence passes over a bar, 10 and between the printing-wheel t and impressing-roller 11-, and from thence between the feed-rollcrs q and q". The lower feed-r0ller, q, is driven bythe ratchet-wheel 12, secured to its end, as above mentioned, and the upper feed-roller, (1 is jourualed at each end to a spring-arm, 15, secured to the fraine It, the said spring-arm imparting sufficient friction to insure the regular rotation of the said roller q". By these means the messagestrip G is moved forward the space between lines of printing thereon by each stroke of the armature of the magnet o. A second strip of paper, G of about the same, width as the former, is placed upon a reel, R and its end passed over the feed-roller q and between thelatter and the lower feed-roller, q, so that it' is fed forward by the action of said rollers along with the strip G, and covers the printing upon the latter. A narrow coating or line of inucilage or similar adhesive matter is ap plied to the edges of the strip G on that side thereof which is uppermostasit passes through the instrument, and .is dried .before said strip is placed upon its reel R; and a cup or fount- .ain,-Y, coutainingwatcr, is secured in a suitable position between the reel R and the feedrollers, andis provided with suitable devices for conducting a small quantity of water to the edges ofthe strip'G, as it passes over the roller to dampen its edges,so that the dampened edges of this strip are pressed against the gummed edges of the strip G as the two stripspass between. the feed-rollers audcaused to ad here to the same,

G over the strip G and concealing the print 'ing-thereon, and the strips thusgummed together then pass out of the instrument, as seen at y, with the printing coucealedbetween them. I

Suitable-devices maybe employed for conveying the water from the fountain Y to the edges of the strip in just suflicient quantity to properly dampen the same-as, for instance,

' a cord, 12, extending from a faucet, r, with of said armature.

which the fountain held in a cup, 8, directly over the upper roller,

the ends of the lower surface of said sponge being held in contact with the edges of the strip G so as to dampen the same asiitpasses over the roller.

The magnet o. and the mechanism connected is secured a crank-wheel, 1, having a pin,f, near its periphery, to which is pivoted one end of a rod, h, the other end of said rod being pivoted to a swivel on the end of the shaft t, which carries the printing-wheel t. The said shaft t slides in' its bearings, andtherefore crank-wisest if causes each revolution of the the printing-wheel to travel back-and forth across the frame It, each stroke of the armature causing it to move so as to leave a space between the letters-as they are printed on the strip G.- By these means a positive trans-- verse motion is impartedto the printing-wheel, and it prints as it moves in both directions, so

thus gummin g the strip.

is provided, to a sponge, s,

which said wheel is rotated by a. pawl At' the end ofithe' shaft b thatone line is printed from left to right and the next line from right to left, as shown in Fig. 7, which represents a plan view-of the printed strip. The swivel f at the end of the shaft t is for the purpose of allowing the rotary movement of said shaft, and the said shaft slides back and forth through the hub of the wheel t being provided with a spline or feather toadmitvof its so doing. I I h The devices for concealing the message-strip as it receives the printing are as follows: t is a plate secured at oneend to the frame 16, or

to thebar upon which the said frame is pivgs. 4 and 6, and extending oted, as shown in Ft 7 from thence to the feed-rollers over the strip,

so as to cover the printing upon said. strip as it passesfrom thexprinting-wheel to the feed- -rollers. That part of the said plate '5 which is immediately-over the impressing-roller u is slotted to permit the strip G to .be' brought into contact with the printing-wheel when .pression of the type on said printing-wheel. The edges'iof this slot are turned downward, as at m, so asv to press upon the strip as it passes over theimpressing-roller u, and keep it snugly in contact with said roller as the impress is being made; and for the purpose of covering the slot or opening in the plated we employ a second plate, i, which is suspended by. hangers j from theshaft t, and moves back andforth therewith, a narrow. transverse slot, 3'', being provided, as shown in Fig. 8, to permit the under surface of the periphery of the printing-wheel to come in contact with the strip G. By these means the printing upon the message-strip is effectually hidden from view as'it travels between raised by the frame 16, was to'receive the imthe printiu g-w-heel and the feed-rollers, and the position. of the plated in relation to theimpressing-roller insures the proper tension of the strip G" as it passes over said roller, so that a perfect impression is made. i is a plate secured -'to the frame R to guide the printed v strip from the feed rollers and outof the in strument between'saidplate and another plate,

5 which is riveted to the spring-arms 15.

Suitable springs are provided to retract the armatures andpawls in the usual manner, and

set-screws to adjust the throw of the arma tures, 'a particular description of which is not deemed to be necessary, as they are constructed and arranged in the usual manner.

' This invention. is an improvement on the receivi'n-gmachine described in our specifica- .tion marked 0; and we do notiu this application claim the general construction'of said machine, but confine our claims herein to the second strip of paper, G and the devices for applying the same, and toth'e devices for operating hereinafter specifically claimed.

What we claim as our invention is-'- f 1. The combination of the message-stri p G and second strip ofpaper, G the feed-rollers q q, operated, as described, by the armature of the magnet o, the impressing-roller wand 5- the transverse feed of the priiitiiig-wheel, as

printing-wheel 1, both constructed tooperate, as described, through the medium of electric impulses, and the fountain Y and sponges, as

' and for the purpose set forth.

2. In combination with the message-strip G, fed longitudinally through the instrument by means of the mechanism described, operated by the armature of the magneto, the printingand g and the plate 2', all constructed. to operate asdescribed, for the purpose set forth,

3. In atolegraphio receiving-instrument, the r 5 combination, with the magnet 0 and its armature, of the pawl or click 8, ratchet-wheel a, crank-wheel f, rod h, and shaft t carrying the printing-wheel t, all arranged and operated substantially as described, for the purpose set 20 forth.

ALBERT F. JOHNSON. FRANK B. JOHNSON.

Witnesses:

M. H.TOPP1; ;G, 7 JOHN S. THORNTON. 

